Find the mean weight (in kg) of 50 boys of a class whose total weight is 1550 kg.

Find the mean weight of 50 boys from the following data : {:("Weight (in kg)",50,52,54,56,60),("Number of boys (frequency)",6,8,15,14,7):}

The mean weight of 150 students in a certain class is 60 kg. The mean weight of the boys from the class is 70 kg, while that of girls is 55 kg. What is the number of girls in the class?

The weights of 10 students in a class are: 35 kg; 27 kg;36 kg;30 kg;29 kg;32 kg.;33 kg. ;28 kg. ;31 kg. ;38 kg a. Find the mean weight, b. minimum weight, and c. number of students whose weight is more than the mean weight, and d. range.

The mean weight of all the students in a certain class is 60 kg. The mean weight of the boys from the class is 70 kg. while that of the girls is 55 kg. What is the ratio of number of boys to that of girls?

The mean weigth of 30 students of a class is 60.2kg . Two students of weights of 50 kg and 67 kg left the class . Find the mean weight of the remaining students

The mean weight of 60 students of a class is 52.75 kg. If the mean weight of 25 of them is 51 kg., find the mean weight of remaining students.

In a group of students,the mean weight of boys is 65 kg.and mean weight of girls is 55 kg.If the mean weight of all students of group is 61kg,then the ratio of the number of boys and girls in the group is

The mean weight of 150 students of a class is 38 kg. If mean weight of the boys and the girls are 40 kg and 35 kg respectively, find the number of boys and girls.